The nearest airport is ACH - St Gallen Altenrhein, located 19.0 km north of Au.
Other airports nearby include FDH - Friedrichshafen (40.0 km north), ZRH - Zurich (81.0 km west), SMV - Samedan (89.7 km south), ZQL - Donaueschingen Villingen (109.0 km north west),